What is CVE-2026-53947?

CVE-2026-53947 is a medium-severity vulnerability in Tryghost Ghost, classified under Observable Response Discrepancy. CVSS score: 5.3/10. Published 2026-06-24.

How severe is CVE-2026-53947?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Tryghost Ghost

CVE-2026-53947

Ghost is a Node.js content management system. From 5.18.0 until 6.21.1, a discrepancy in responses from the members signin endpoints made it possible for an unauthenticated attacker to determine whether a given email address belongs to a r…

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

Affected products

Tryghost Ghost — versions >= 5.18.0, < 6.21.1

Weakness classification (CWE)

CWE-204 — Observable Response Discrepancy

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-53947?: CVE-2026-53947 is a medium-severity vulnerability in Tryghost Ghost, classified under Observable Response Discrepancy. CVSS score: 5.3/10. Published 2026-06-24.
How severe is CVE-2026-53947?: Medium severity. CVSS v3 base score is 5.3 out of 10.